Just formatted and reinstalled everything...

[#1]

So with a fresh copy of vista ultimate on my PC it says i am using 50 gig of space, how is this possible?  Any ideas please?
At first i thoguht it might of been my documents redirect to my server with off line folders synching and bringing them across, but its not.

[#2]

Have you checked the folders on the C: drive to see which one is doing the damage.
As a comparison my Vista Home Premium 64 bit takes up about 30GB excluding Program Files, Program Files (x86), Program Data and Swap File.

[#3]

Yeah i checked them all, i did a control A on all files including hidden files and it totals up to nearly 10 gig, yet my hardrive is at
99.4 gig free of 153
53.6 gig used
I can only see roughly 10 gig of files though.